Portable peak flow meter



FIG. 1 is a top, front and right side perspective view of a portable peak flow meter showing our new design;

FIG. 2 is a bottom plan view;

FIG. 3 is a rear elevational view;

FIG. 4 is a top, front and right side perspective view, shown in an open condition; and,

FIG. 5 is a bottom plan view thereof.

FIG. 3 has been drawn on a slightly enlarged scale with respect to FIGS. 1, 2, 4 and 5 while FIG. 2 has been drawn on a slightly reduced scale with respect to FIGS. 1, 3-5. 

The ornamental design for a portable peak flow meter, as shown and described. 